EP1235628B1 - Full flow mechanical failsafe - Google Patents

Full flow mechanical failsafe Download PDF

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Publication number
EP1235628B1
EP1235628B1 EP00964968A EP00964968A EP1235628B1 EP 1235628 B1 EP1235628 B1 EP 1235628B1 EP 00964968 A EP00964968 A EP 00964968A EP 00964968 A EP00964968 A EP 00964968A EP 1235628 B1 EP1235628 B1 EP 1235628B1
Authority
EP
European Patent Office
Prior art keywords
sealing plug
flow
failsafe
full
set forth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00964968A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1235628A4 (en
EP1235628A1 (en
Inventor
Todd R. Snyder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southern Research Institute
Original Assignee
Southern Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southern Research Institute filed Critical Southern Research Institute
Priority to DK00964968T priority Critical patent/DK1235628T3/da
Publication of EP1235628A1 publication Critical patent/EP1235628A1/en
Publication of EP1235628A4 publication Critical patent/EP1235628A4/en
Application granted granted Critical
Publication of EP1235628B1 publication Critical patent/EP1235628B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0089—Anti-return means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0095—Means acting upon failure of the filtering system, e.g. in case of damage of the filter elements; Failsafes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7723—Safety cut-off requiring reset
    • Y10T137/7726—Responsive to change in rate of flow
    • Y10T137/7727—Excessive flow cut-off
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7785—Valve closes in response to excessive flow

Definitions

  • This invention relates generally to fluid flow control systems, and to mechanical failsafes or shut-off devices for preventing the flow of fluids (e g. , gas or liquid streams) upon breakage or failure of components in the system, such as filters or other components. More particularly, the invention relates to devices for preventing the flow of high-temperature (e.g., up to 982.2°C (1800°F)) gas streams upon filter damage.
  • fluids e.g. , gas or liquid streams
  • components in the system such as filters or other components. More particularly, the invention relates to devices for preventing the flow of high-temperature (e.g., up to 982.2°C (1800°F)) gas streams upon filter damage.
  • high-temperature e.g., up to 982.2°C (1800°F)
  • barrier filter systems are critical to the successful commercialization of PFBC and IGCC coal-based power plant systems.
  • PFBC and IGCC coal-based power plant systems Presently the most commercially ready barrier filter systems are based on candle filter technology. These barrier filter systems generally employ a large number of individual, porous candle filter elements in parallel.
  • Pilot-scale candle filter-based systems have been shown to remove particulate matter down to a concentration of less than 1 ppm (part per million) when in good operating condition.
  • the filter system outlet dust loading will increase and thereby potentially damage gas turbine blades, contaminate other downstream processes, and limit the availability of the power system.
  • a filter failure safeguard device which would prevent the flow of particle-laden gas through the failed filter element location would serve to minimize the potential damage to downstream equipment, minimize dust emissions, and allow the power plant to continue operation until a convenient or scheduled outage can be implemented.
  • DE-A-2547470 discloses a safety valve having a stationary disk portion 4 and a moving disk portion 6 located in a flow channel 2.
  • the disk 6 is normally locked against the stationary disk 4 by a ball friction coupling 8 kept in place by a tappet rod 12b.
  • the disk 6 is tensioned by a coil spring 7. When pressure of the gas flowing in the channel exceeds a predetermined magnitude against the surface 121, it causes the rod to move to the right, releasing the ball coupling 8 and causing the spring 7 to force the movable disk 6 toward the end of the valve such that the valve disk 61 is sealed against the valve seat 11.
  • a full-flow failsafe for a fluid flow system comprising: a shell comprising an inner wall and having apertures at each end thereof for enabling a fluid stream to flow therethrough, a first one of said apertures admitting a fluid stream into the failsafe, and a second one of said apertures allowing said fluid stream to exit said failsafe; a sealing plug movably positionable within said shell, said sealing plug comprising a lower surface and an upper surface, said sealing plug being oriented in a first position during normal fluid flow of said system to permit fluid flow through said shell, and being movable to a second position wherein said upper surface of said sealing plug forms a sealing contact with said second one of said apertures; and characterised by said sealing plug being movable by increased fluid velocity, said increased fluid velocity being of a magnitude indicative of improper operation of said system, and further comprising at least one locking mechanism, said locking mechanism being disposed between said inner wall and said lower surface of said sealing plug thereby supporting said sealing plug in said first position, said locking mechanism being
  • the present invention provides an improvement to the prior art, by providing according to one embodiment a full-flow failsafe, including a filter element for filtering entrained particles from a flowing fluid stream, a shell having apertures at each end thereof for enabling the fluid stream to flow therethrough, a first one of the apertures being coupled to the filter element, a sealing plug movably positioned within the shell, the sealing plug being oriented in a first position during normal operation of the filter element to permit fluid flow through the shell, and, upon failure or breakage of the filter element, being moved by increased fluid velocity to a second position wherein the sealing plug forms a sealing contact with a second one of the apertures, and a locking mechanism supporting the sealing plug in the first position, and being moved to a locking position for securing the sealing plug in the second position in response to the movement of the sealing plug.
  • the full-flaw mechanical failsafe is particularly adapted for candle filter systems including candle filters 110.
  • candle filter systems would be used, for example, in power plants for removing dust and, other solid particle pollutants or contaminants from gases at temperatures up to approximately 898.9°C (1650°F) flowing through various stages of the power plant equipment.
  • the second cause is the case wherein solid particles breach the tubesheet 302 as a result of catastrophic failure or breakage of one or more candle filter elements 110. Failures of this type have been experienced at many pilot- and demonstration-scale Hot Gas Cleanup (HGCU) filter systems, and present the primary challenge for system reliability that is addressed by the present invention.
  • HGCU Hot Gas Cleanup
  • the mechanical failsafe device 100 includes a cylindrical shell 101, about 7.62 cm (3 inches) in diameter and about 10.16 to 12.7 cm (4 to 5 inches) in height Apertures 102 and 103 are centered at the top and bottom of the shell 101, and allow filtered flue gas to flow upward through the device in a flow direction indicated by arrows 104 during normal operation, and pulse cleaning gas to flow downward through the device in an opposite direction, when an intact and operational filter element 110 is connected to the failsafe.
  • a sealing plug 105 is provided in the interior of the cylindrical shell 101.
  • Sealing plug 105 is essentially in the shape of a hemisphere joined on its lower flat surface to the flat surface of a cone of equal diameter to the hemisphere.
  • the sealing plug 105 is supported in the shell by three locking spheres 107, (only one of which is shown for simplicity) preferably positioned 120° from each other around the conical portion of the sealing plug.
  • the spheres rest in grooves or channels 109 in a conical surface 108 in the shell interior, and also contact inner angled surface 311 of the shell 101. As shown in Fig. 3, the grooves 109 are cut into the surfaces 108 under the spheres 107 to guide their movement when the mechanical failsafe is activated, as explained further below.
  • a continuous indentation 202 is formed around the circumference of the lower surface 201 of the sealing plug, at a position where the indentation 202 contacts the spheres as shown in Fig. 1, to assist in holding the sealing plug in the inactive position during the occurrence of vibrations that may be experienced in the filter vessel during installation and normal operation.
  • the diameter of the spheres 107, the dimensions of the shell 101, the sealing plug 105, the conical surfaces 108 and 201, the apertures 102, 103 and the annular gap 304 between the inner surface of the shell 101 and the sealing plug 105 at its widest dimension are designed such that, with the normal flowrate of filtered gas upward through the failsafe, the upward pressure on the sealing plug 105 will not be sufficient to cause the sealing plug 105 to be lifted from its resting position on the spheres 107 when the filter element 110 is intact.
  • the weight of the sealing plug 105 can be selected during design by adjusting the size of the internal volume 303, or in other words a portion of the interior of the sealing plug may be solid to establish the optimum weight to ensure the proper stability of the plug on the spheres during normal operation for the particular flow parameters of the system on which it is installed.
  • the hemispherical portion 312 of the plug is provided as a piece separate from the conical portion 313. This allows the amount of internal volume 303 to be selected at the manufacturing stage, either by manufacturing conical portions 313 of varying internal volume, or by filling the internal volume 303 with an appropriate amount of a suitable material for adjusting the weight of the sealing plug 105.
  • the two pieces 310 and 313 are then joined together.
  • a threaded connection 314 may be provided for this purpose; other joining methods may be used equivalently.
  • the weight of the sealing plug also is determined by the degree that the upward flow must increase (as would occur in a failure) in order to lift the sealing plug and activate the failsafe (as shown in Fig. 2).
  • the weight of the sealing plug and the dimension of the gap 304 are set so that only the flowrate encountered in a failure of the filter element will be sufficient to lift the sealing plug enough to activate the failsafe device.
  • the failsafe 100 is attached to the tubesheet 302 with the aid of a mounting bracket or flange 114. Other attachment mechanisms may be used, depending on the tubesheet design.
  • a gasket 106a is provided between the failsafe and the filter, and an additional gasket 106b may be provided between the filter element 110 and the tubesheet 302.
  • Gaskets 106a and 106b may be made of Nextel® or similar material.
  • the shell 101 may be constructed from two separate pieces, joined together at flange 307 or by other equivalent joining means, to enable installation and removal of the sealing plug and locking spheres.
  • the apertures 102,103 and the annular gap 304 should be sized such that sufficient flow paths are maintained within the failsafe for the passage of filtered flue gas and pulse cleaning gas to minimize the addition of flow resistance to the system by the failsafe during either filtering or pulse cleaning operations.
  • the upward flow 104 of filtered flue gas provides an increased pressure in the lower portion of the failsafe 100, having a magnitude determined by the velocity v and the density ⁇ of the gas according to Bernoulli's term 1 ⁇ 2 ⁇ v 2 .
  • a large proportion of this pressure will be dissipated across the annular gap 304.
  • Constrictions in the annular gap act as an annular orifice for gas flow; the smaller this annular orifice, the more pressure is dissipated as the gas passes through it.
  • the filter element 110 breaks, as shown in Fig. 2, two conditions change in the vicinity of the mechanical failsafe 100.
  • the first is that the upward velocity of the gas through the remaining part of the broken filter element and the mechanical failsafe increases very rapidly, driven by the tubesheet pressure drop (not shown) at the time of breakage.
  • the second is that particle-laden or unfiltered or untreated gas advances from the point of breakage of the filter. element 110 towards the top of the candle filter element and the mechanical failsafe 100. Because the failsafe desirably is activated almost instantaneously in response to the rapid increase of upward gas velocity experienced in a filter element failure, little or no particle-laden gas or untreated gas is expected to exit the top of the failsafe before the failsafe is fully activated and the flow of gas is shut off.
  • the increased gas velocity through the mechanical failsafe 100 creates a significantly higher pressure drop across the annular orifices around the sealing plug, thereby significantly increasing the upward pressure on the sealing plug itself.
  • the degree to which the velocity of the gas entering the mechanical failsafe will be increased upon the breakage of a filter element is primarily dependent upon the tubesheet pressure drop and the dimensions of the portion of the broken filter element that remains attached to the tubesheet Calculations have indicated that, following the breakage of a filter element, the velocity of gas through the mechanical failsafe could be increased by a factor of 10 or more (with the concomitant increase of upward pressure on the sealing plug increasing by a factor of 100 or more).
  • the interior of the shell 101 can be shaped such that the pressure across the annular orifice adjacent to the widest portion of the sealing plug would increase as the plug travels upward by making the annular gap smaller as the plug nears the sealing surface 306 at the top of the shell 101.
  • the sealing plug reaches the top of the shell and fully contacts the sealing surface 306, the gas flow is completely blocked and the upward force is reduced to zero.
  • the spheres 107 begin to roll down the inclined surface 108 in a straight direction aided by the grooves 109, as shown in Fig. 2, until the spheres become pinched in position at the bottom of the sealing plug 105 at location 319, between the plug and the grooves 109 in the inclined surface of the shell.
  • the dimensions of the spheres, shell and sealing plug are designed to prevent the spheres from falling down through the aperture 103 at the bottom of the shell (see Fig. 1).
  • an optional axial alignment pin 205 may be attached to the top of the shell and extends into the body of the sealing plug through a close tolerance guide hole 308 and through the body into a second guide hole 309.
  • the alignment pin may be attached to the top of the shell with a frame 316 through a threaded connection 318.
  • the frame 316 may be attached to the shell with screws 317.
  • the alignment pin alternatively may be attached to the sealing plug and extend through guide holes in the shell.
  • the alignment pin 205 assists in the proper seating of the sealing plug against the sealing surface 306 of the shell.
  • paraffin may be used to hold the sealing plug and spheres in their proper positions within the shell by application to the contacting surfaces of the spheres.
  • the paraffin would melt and burn off as the filter system is preheated during a system startup process. Reapplication of paraffin would be unnecessary except where a failsafe had to be removed, reconditioned and reinstalled after activation by the failure of its filter element.
  • the full-flow mechanical failsafe of the present invention provides several advantages over failsafe devices that make use of entrained particles in the flowing gas to form a seal.
  • the formation of a seal by using such entrained particles takes place gradually, whereas the mechanical failsafe of the invention shuts off the flow of particle-laden gas almost immediately upon filter breakage.
  • the effectiveness of the mechanical failsafe is thus independent of particle concentration.
  • seals that depend on plugging of flow paths by entrained particles can be compromised by the application of periodic reverse flow cleaning gas pulses.
  • the failsafe of the present invention provides a positive seal against the force exerted by such cleaning pulses. In the event a failure occurs during application of a cleaning pulse, the failsafe will be activated as soon as the normal fluid flow direction is reestablished.
  • Reconditioning of activated failsafes is fairly simple. All components are preferably made of suitable material (such as 310 SS steel, which is well suited to HGCU filter applications) which can be washed, dried, reconfigured in an inactive mode, and reinstalled.
  • suitable material such as 310 SS steel, which is well suited to HGCU filter applications
  • the basic principles of the full-flow mechanical failsafe may be adapted in alternate embodiments for applications other than HGCU particle filtration.
  • similar devices of much larger scale may be used in an oil or gas pipeline.
  • the failsafe devices would be positioned at periodic intervals along such pipelines, in short vertical runs where the flow direction is upward. In the event of pipeline failure, the fluid flow would increase most immediately upstream from the failsafe device, activating it and shutting off the flow, thus minimizing fluid loss as well as potential safety and environmental hazards.
  • Another alternate embodiment of the invention could be configured such that even a small upward flow of fluid would activate the device. This embodiment would be useful to prevent backward flow in a system where the normal fluid flow direction was downward.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Safety Valves (AREA)
  • Details Of Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Air Bags (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Window Of Vehicle (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP00964968A 1999-09-13 2000-09-13 Full flow mechanical failsafe Expired - Lifetime EP1235628B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00964968T DK1235628T3 (da) 1999-09-13 2000-09-13 Mekanisk fuldströmningssikkerhedsindretning

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US15322399P 1999-09-13 1999-09-13
US153223P 1999-09-13
PCT/US2000/024960 WO2001019494A1 (en) 1999-09-13 2000-09-13 Full flow mechanical failsafe

Publications (3)

Publication Number Publication Date
EP1235628A1 EP1235628A1 (en) 2002-09-04
EP1235628A4 EP1235628A4 (en) 2002-11-06
EP1235628B1 true EP1235628B1 (en) 2005-03-02

Family

ID=22546284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00964968A Expired - Lifetime EP1235628B1 (en) 1999-09-13 2000-09-13 Full flow mechanical failsafe

Country Status (10)

Country Link
US (2) US6656254B1 (es)
EP (1) EP1235628B1 (es)
JP (1) JP4870302B2 (es)
AT (1) ATE289853T1 (es)
AU (1) AU776413B2 (es)
CA (1) CA2384426C (es)
DE (1) DE60018454T2 (es)
ES (1) ES2239039T3 (es)
PT (1) PT1235628E (es)
WO (1) WO2001019494A1 (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60018454T2 (de) * 1999-09-13 2006-02-16 Southern Research Institute, Birmingham Mechanische sicherheitsvorrichtung für strömungen
US6790286B2 (en) * 2001-01-18 2004-09-14 Dainippon Screen Mfg. Co. Ltd. Substrate processing apparatus
USD492753S1 (en) 2003-04-25 2004-07-06 Procter & Gamble Fluidic cartridge end piece
USD494654S1 (en) 2003-04-25 2004-08-17 Procter & Gamble Co. Fluidic cartridge fittings
FI122494B (fi) * 2010-05-20 2012-02-29 Metso Power Oy Menetelmä ja laite letkusuotimessa
US8876017B2 (en) * 2010-08-11 2014-11-04 Bilfinger Water Technologies, Inc. Variable flow screen nozzle
US10525387B2 (en) 2017-04-06 2020-01-07 Whirlpool Corporation Filter cartridge
US10584040B2 (en) 2017-10-06 2020-03-10 Whirlpool Corporation Filter cartridge

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE146477C (es)
US1983791A (en) 1932-11-10 1934-12-11 Donald C Carver Automatic safety valve
US2635629A (en) 1950-02-08 1953-04-21 Asaro Carmelo Excess flow cutoff valve
US2687745A (en) 1950-03-22 1954-08-31 Hackett Norman Henry Safety shutoff valve for fluid pipe lines
US2680451A (en) 1953-03-30 1954-06-08 Don C Hill High-pressure cutoff valve for dust pot assembly
US2833117A (en) 1954-07-29 1958-05-06 Frederick J Wilcocks Brake safety shut-off valve
US2892512A (en) 1957-08-16 1959-06-30 Standard Oil Co Flow limiting filter valve
US3261146A (en) 1963-04-24 1966-07-19 Comet Ind Air filter apparatus for removing moisture and foreign matter from compressed air
US3478881A (en) * 1967-07-03 1969-11-18 Bendix Corp Shut-off valve for fuse filter
US3712030A (en) * 1970-09-14 1973-01-23 J Priest Exhaust depurator
DE2547470A1 (de) 1975-10-23 1977-04-28 Interatom Sicherheits- bzw. unterdruckventil
US4026685A (en) * 1975-12-16 1977-05-31 Wagner Electric Corporation Flow reversing regenerative air dryer
US4071038A (en) * 1976-10-01 1978-01-31 Robinson Dale D Failsafe fluid control valve
US4356007A (en) * 1979-07-10 1982-10-26 Bowman Harold L Automatic filter network protection, failure detection and correction system and method
US4297113A (en) * 1980-03-03 1981-10-27 Louis Theodore Gas filtration apparatus
US4373548A (en) * 1981-07-08 1983-02-15 Chou Martin S Gas flow safety control device
US4485011A (en) * 1981-12-30 1984-11-27 Facet Enterprises, Inc. Fuel contamination monitor with a shut off valve
JPS6012781A (ja) * 1983-07-01 1985-01-23 Matsushita Electric Ind Co Ltd 光導電素子の製造方法
JPS6012781U (ja) * 1983-07-07 1985-01-28 株式会社　浜井製作所 高圧ガス容器用弁における遮断弁ロツク装置
JPS61101159A (ja) * 1984-10-24 1986-05-20 Matsushita Electric Ind Co Ltd ボタン電話装置
JPS61101159U (es) * 1984-12-07 1986-06-27
US4707165A (en) * 1985-03-04 1987-11-17 Aeroquip Corporation Gas and fluid separator
JPS63182011A (ja) * 1987-01-22 1988-07-27 Osaka Gas Co Ltd 遮断弁付きフイルタ−
JPH01171978A (ja) * 1987-12-28 1989-07-06 Mitsubishi Rayon Co Ltd 転写紙の揺変性インキバインダー用樹脂組成物
JPH0645739Y2 (ja) * 1988-05-25 1994-11-24 株式会社濱井製作所 高圧ガス容器用弁
JPH03128418A (ja) * 1989-07-20 1991-05-31 Yokogawa Electric Corp 光学式エンコーダ
JPH03128418U (es) * 1990-04-05 1991-12-25
SE469370B (sv) 1991-11-12 1993-06-28 Abb Carbon Ab Foerfarande och anordning vid filterventil
US5242581A (en) 1992-03-30 1993-09-07 Facet Quantek, Inc. Shut-off valve
US5248414A (en) * 1992-04-20 1993-09-28 Facet International, Inc. Filter having improved means of positive shutoff incorporating sleeve valve seat
DE4226146A1 (de) 1992-08-07 1994-02-10 Babcock Energie Umwelt Vorrichtung zum Filtern von heißen, staubbeladenen Gasen
JPH09310799A (ja) * 1996-05-23 1997-12-02 Fukuo Sakamoto ガス放出防止機構付きガス容器バルブ
DE60018454T2 (de) * 1999-09-13 2006-02-16 Southern Research Institute, Birmingham Mechanische sicherheitsvorrichtung für strömungen
US6428708B1 (en) * 2000-03-07 2002-08-06 Kinetico Incorporated Filter apparatus and method

Also Published As

Publication number Publication date
AU7577300A (en) 2001-04-17
EP1235628A4 (en) 2002-11-06
DE60018454D1 (de) 2005-04-07
ES2239039T3 (es) 2005-09-16
PT1235628E (pt) 2005-06-30
CA2384426A1 (en) 2001-03-22
US6655259B2 (en) 2003-12-02
JP4870302B2 (ja) 2012-02-08
ATE289853T1 (de) 2005-03-15
DE60018454T2 (de) 2006-02-16
AU776413B2 (en) 2004-09-09
JP2003509187A (ja) 2003-03-11
US20020129853A1 (en) 2002-09-19
US6656254B1 (en) 2003-12-02
CA2384426C (en) 2008-11-18
WO2001019494A1 (en) 2001-03-22
EP1235628A1 (en) 2002-09-04

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